[dpdk-dev] [PATCH 0/4] check if any kernel driver is manipulating the virtio device

[Peter Xu]

On Fri, Dec 25, 2015 at 02:38:08AM +0800, Huawei Xie wrote:
> virtio PMD doesn't set RTE_PCI_DRV_NEED_MAPPING in drv_flags of its
> eth_driver. It will try igb_uio and PORT IO in turn to configure
> virtio device. Even user in guest VM doesn't want to use virtio for
> DPDK, virtio PMD will take over the device blindly.
> 
> The more serious problem is kernel driver is still manipulating the
> device, which causes driver conflict.
> 
> This patch checks if there is any kernel driver manipulating the
> virtio device before virtio PMD uses port IO to configure the device.
> 
> Huawei Xie (4):
>   eal: make the comment more accurate
>   eal: set kdrv to RTE_KDRV_NONE if kernel driver isn't manipulating the device.
>   virtio: return 1 to tell the kernel we don't take over this device
>   virtio: check if any kernel driver is manipulating the virtio device

Thanks for the patch. Looks good to me.

Peter

> 
>  drivers/net/virtio/virtio_ethdev.c     | 15 +++++++++++++--
>  lib/librte_eal/common/eal_common_pci.c |  8 ++++----
>  lib/librte_eal/linuxapp/eal/eal_pci.c  |  2 +-
>  3 files changed, 18 insertions(+), 7 deletions(-)
> 
> -- 
> 1.8.1.4
>